This is a demo app I created for a challenge. It's very simple and can only display a collection of photos on iPhones, iPads, Apple Watch and Apple TV.
The project contains only low-res stock photos and cannot access the camera roll, so it's best to demo on an iPhone 4S. It will run properly on watchOS, tvOS and iOS - supporting all iPad and iPhones running iOS 9.1. You need Xcode 7.1 to build and run it.
The stock photos are from http://www.gratisography.com/terms.html released under Creative Commons Zero. The project does not contain third party frameworks or code.
The Gallery has 3 main components:
- The photo store
- The gallery view, implemented with as a collection view
- The single photo view, implemented with a scroll view and an image view with a label
On watchOS a picker control is used to display single photos, a gallery view is not feasible.
Making use of auto-layout, size classes and dynamic type, each component has only a single implementation that supports all platforms.
A photo is replesented by a Photo object, which contains the actual image and a description. StockPhotoStore provides a couple of low-res stock photos which the app can use without accessing the camera roll.
If you want to acces the device's photos you can do so by replacing StockPhotoStore with DevicePhotoStore in the GalleryCollectionViewController. I'm not offering this as default or through the UI, because it's not available on the Apple TV and has some issues when loading photos from iCloud storage.
GalleryCollectionViewController is the root view controller of the dem app. It uses GalleryCollectionViewCell to display miniaturised versions of the photos. Note that there is no offline optimization, so using a very large number of photos might raise performance issues. Tapping one of the cells - or selecting one with the TV remote - will show the select image modally.
When looking at a single photo the PhotoPageViewController allows swiping left or right to show the next picture, tapping - or pressing the menu button - will go back to the gallery view. The PhotoScrollViewController nested inside allows zooming in and out and scrolling the photo.
Firtst you have to select the scheme for the platform you want to run the demo on and which simulator you want to run it in. There are 3 shared schemes:
- tvGallery for watchOS
- iGallery for iOS (iPhone, iPad)
- watchGallery for Apple Watch
After that you should be able to build and run the demo app.
For deploying on devices you might have to change the Bundle Identifier and make sure that Xcode is set up correctly for signing.
My name is Christian König, I'm an independent iOS devopler from Germany. You can find me on Twitter as @CodeStage